* {
    padding: 0;
    margin: 0;
}

a {
    text-decoration: none;
    color: #b3bcc5;
}

.header {
    height: 70px;
    background-color: #354457;
    color: #b3bcc5;
    font-size: 14px;
    line-height: 70px;
    padding-left: 20px;
}

.header .duyilogo {
    width: 30px;
    height: 30px;
    vertical-align: middle;
}
.left-mean {
    width: 200px;
    background-color: #4d5e70;
    color: #b3bcc5;
    /*100vh 表示电脑屏幕的高度 calc可以让类型转换 70px是减去顶栏的高度*/
    height: calc(100vh - 70px);
    font-size: 14px;
    line-height: 38px;
}
.left-mean dt{
    padding-left: 10px;
}
.left-mean dd{
    padding-left: 40px;
}
.right-content{
    position: absolute;
    left: 200px;
    top: 70px;
    height: calc(100vh - 70px);
    width: calc(100% - 200px);
    overflow: hidden;
}
.left-mean dd a{
    width: 100%;
    display: block;
}
.left-mean dd.mean-active{
    background-color: #ddd;
}
.left-mean  dd.mean-active a {
    color: #354457;
}
#studnt-list {
    height: 100%;
    overflow-y: scroll;
}
#student-add {
    height: 1000px;
}


form {
    width: 400px;
    margin: 0 auto;
    padding-top: 10px;
}

form label:not(.sex) {
    width: 100px;
    display: inline-block;
    text-align: right;
    margin-right: 10px;
}
form div {
    margin: 10px 0;
}
/*按钮样式*/
.btn {
    padding: 10px 23px;
    cursor: pointer;
    background-color: #0089d0;
    color: #fff;
    border: none;
    border-radius: 5px;
    outline: none;
}
.btn:hover{
    background-color: #0069D9;
    box-shadow: 0px 0px 5px 3px  #92C7FF;
}

#studnt-list table {
    width: 100%;
    text-align: center;
    line-height: 30px;
    font-size: 14px;
}

#studnt-list table thead {
    background-color: #e3e8ee;
    color: #646987;
}
#studnt-list table tbody {
    background-color: #fff;
}
#studnt-list .operation-btn {
    padding: 5px 10px;
    border: none;
    outline: none;
    color: #fff;
    cursor: pointer;
}
#studnt-list .operation-btn.edit {
    background-color: #5cb85c;
}
#studnt-list .operation-btn.remove {
    background-color: #d9534f;
}

.modal {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
}
.modal-content {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    width: 400px;
    height: 400px;
    background-color: #fff;
    margin: auto;
    padding: 20px;
}

/*登录注册*/
#student-login{
    height: 1000px;
}
#student-register{
    height: 1000px;
}

/*输入框样式*/
input{
    background-color: #fff;
    outline: none;
    border: 2px #b3bcc5 solid;
}
